Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

The first blast furnace in the United States that used coal and coke fuel instead of charcoal to make pig iron.

This university transit system is a 1970's vision of the future.

Washed out by the Johnstown Flood in 1889, the surviving portion of the original two-span bridge now resides at Fishing Creek.

The final resting place of an iconic drag performer is decorated with pearls and hot-pink lipstick.

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

Once a thriving business district, this former shopping area is now an urban ghost town in the heart of the city.

Once part of a dam servicing an early 19th century grist mill, the tucked-way falls are a tricky-to-find urban oasis.

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

The land is home to swimming ponies and a legendary 18th-century treasure.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

This sanguine boulevard was named after a deadly cowboy bar fight.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

This one-room cabin where the young colonel slept during the French and Indian War.

The actor best known for slapstick comedy is memorialized in his home town.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

The antique hotel still has a jail in the basement, though the cockfighting ring is long gone.

World War II bunker still standing on the New Jersey beach.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

A museum dedicated to exhibiting remarkable outsider art.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.